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Energy

Definition

noun, plural: energies

(1) Tthe capacity for work.

(2) The ability to do work, or produce change.


Supplement

Energy exists in different forms but is neither created nor destroyed; it simply converts to another form. Examples of energy include: kinetic, potential, thermal, gravitational, elastic, electromagnetic, chemical, nuclear, and mass. Energy can be expressed in joules or ergs

In biology, energy is often stored by cells in biomolecules, like carbohydrates (sugars) and lipids. The energy is released when these molecules have been oxidized during cellular respiration. The energy released from them when they are oxidized during cellular respiration is carried and transported by an energy-carrier molecule called ATP.

Word origin: From Ancient Greek ἐνέργεια (energeia) "action, act, work", < ἐνεργός (energos) "active" < ἐν (en) "in" + ἔργον (ergon) "work".

Related forms: energize (verb), energetic (adjective).
Related phrases: kinetic energy, potential energy, solar energy.


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Transpiration and Photosynthesis.

Photosynthesis requires water to happen. The water is photolysed (split apart) using the energy gained from sunlight, which will draw more up through the xylem from the roots. However more significantly for photosynthesis to take place there needs to be gas exchange ...

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by Babybel56
Fri Mar 14, 2014 4:07 am
 
Forum: Botany Discussion
Topic: Transpiration and Photosynthesis.
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Views: 213

Increase in free energy in glycolysis

There is difference between standard Gibbs energy and actual Gibbs energy. The other reactions are close to equilibrium (thus they can be used by gluconeogenesis as well) and only the actual concentrations of the substrates/products determine ...

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by JackBean
Thu Feb 06, 2014 10:42 am
 
Forum: Molecular Biology
Topic: Increase in free energy in glycolysis
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Views: 629

Increase in free energy in glycolysis

... Unfortunately, while I appreciate your reponse, it doesn't answer my question. In most basic terms, for a system to move from a given energy state to a higher energy state, energy has to enter the system (because energy is conserved). In this example, where did that energy come from?

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by cadamcross
Wed Feb 05, 2014 3:10 am
 
Forum: Molecular Biology
Topic: Increase in free energy in glycolysis
Replies: 3
Views: 629

Re: Increase in free energy in glycolysis

Increase in free energy just refers to Gibbs free energy. That free energy comes from enthalpy (internal energy) - entropy (chaos). Also expressed as Gibbs Free Energy = Enthalpy - Entropy. The idea is that with each subsequent step ...

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by daniel.kurz
Wed Feb 05, 2014 3:03 am
 
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Topic: Increase in free energy in glycolysis
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Re: Industrial Society Destroys Mind and Environment

... hippocampus is shriveled unable to stop the stress response. This leads to Alzheimer's. We consume and consume. Our brains shut down to conserve energy leaving our bodies controlled by habits and instincts and classical conditioning. It is not the food driving people to work. It is advertising. ...

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by wript
Mon Feb 03, 2014 12:51 am
 
Forum: Ecology
Topic: Industrial Society Destroys Mind and Environment
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